US548222A - Burton s - Google Patents

Description

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SWITCH STAND AND LOOK.

No. 548,222. Patented Oct. 22, 1895.

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No. 548,222. Patented Oct. 22, 1895.

NIT D STATES PATENT OFFICE.

BURTON S. ROBERTSON, OF ANAOONDA, MONTANA, ASSIGNOR OF ONE-HALF TO DAVID C. WALKER, OF SAME PLACE.

SWITCH STAND AND LOO K.

SPECIFICATION forming part of Letters Patent No. 548,222, dated October 22, 1895. Application filed August 20,18 95- Serial No. 559,941. (No model.)

To all whom it may concern:

Be it known that I, BURTON S. ROBERTSON, a citizen of the United States, residing at Anaconda, in the county of DeerLodge and State of Montana, have invented a new and useful Switch Stand and Look, of which the following is a specification.

My invention relates to a switch stand and lock, and has for its object to provide a construction and arrangement of parts whereby the key for manipulating the lock to release the handle or lever by which the operating part of the switch-stand is moved cannot be withdrawn or disengaged from the lock except when the parts of the switch are set for the main track or for a prescribed track.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure l is a perspective view of a switch-stand constructed in accordance with my invention. Fig. 2 is a vertical central section of the same. Fig. 3 is a plan view of a stationary table with the upper side of the lock-casing broken away. Fig. 4 is a vertical section of the lock mechanism on the line 4 4 of Fig. 3, showing the positions of the parts when the bolt is shot and is in engagement with the operating lever or handle. Fig. 5 is a similar view showing the parts in the positions which they assume when the lever or handle is released, the keyhole-guard, whereby the removal of the key is prevented, being extended across the keyhole.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

The stationary table 3 is provided with a central or main notch 9 and one or more secondary or auxiliary notches 10, with either of which may be engaged the operating lever or handle 11, which is pivotally mounted at its upper end upon the rotary head or table 4, whereby the rotary head may be temporarily secured in aplurality of positions to hold the switch-rails in operative relation with either of a plurality of tracks.

The main notch 9 for engagement by the operating lover or handle is that in which the lever is engaged when the switch-rails are in their normal or preferred position, and hence in connection with this notch is arranged a locking device consisting of a sliding bolt 12, mounted in suitable guides in a casing 13, formed by cutting away a portion of the main or stationary table 3. This bolt is provided with an actuating-spring 14, by which it is normally held in its extended position, and with a shoulder 15 for engagement by a key 16 to repress the bolt against the tension of its spring. Suitable wards 17 should be employed to insure the use of a certain key 1nserted through the keyhole 18.

Arranged in connection with the lockingbolt, which is provided with a projection 19, is a locking-bar 20, pivoted in an opening 21, communicating with the lock-casing and provided with a terminal nose 22, projecting slightly above the plane of the upper surface of the stationary table 3. The operating lever or handle carries a trip 23, to which it is connected by means of a link 24, said trip having a beveled face 25, adapted to engage the nose 22 of the locking-bar and depress the same to elevate the outer end of said bar, and thus disengage it from the locking-bolt. Gravity or other equivalent means is employed to depress the locking-bar and hold it normally in position to engage the projection 19 ofthe locking-bolt, whereby when said locking-bolt is repressed by the operation of the key said locking-bar falls in front of the projection 19 and prevents the bolt from returning to its locked position. When the rotary head is turned to bring the operating 1ever or handle opposite the notch, in connec tion with which the locking mechanism is ICO employed, and said lever or handle is repressed into the notch, the trip 23 engages the nose or arm 22 of the locking-bar and elevates the lock at its free outer end sufficiently to remove it from contact with the projection 19, whereby the locking-bolt is released, and is actuated by a spring to engage a socket 26 in the side of the operating-lever.

It will be understood that the rotary table or head 4 is spaced at its lower edge a sufficient' distance from the plane of the upper surface of the stationary table to allow the trip 23, after the depression of the contiguous end or nose 22 of the locking-bar 20, to move laterally with the rotary head without engaging the edge of the cavity 21 in the stationary table, such an interval being clearly illustrated in Fig. 2 of the drawings.

The operating-lever is pivoted at an interval from its upper extremity to form an arm 27, carrying a staple 28, said arm being arranged to move from its vertical to its horizontal position in a casing 29, forming a part of the rotary head 4, and this casing is provided at its front or outer side with a lip or wall 30, having an opening 31 through which the staple 28 projects when the operating-lever is in its vertical position or is in engagement with the notch in the stationary table. A padlock may be engaged with this staple to hold the operating-lever in engagement with the notch when, by reason of accidents or otherwise, the locking mechanism, as above described, is inoperative.

Arranged to operate contiguous to the outer wall of the lock-casing, and hence contiguous to the keyhole formed therein, is a keyhole guard 32, carried by the locking-bolt and adapted, when the locking-bolt is repressed against the tension of its actuating-spring, as when releasing the operating lever or handle,

. to extend across the keyhole and thereby prevent the removal of the key. Hence, when, after inserting the key and forcing the locking-bolt back to release the operating lever or handle, the locking-bolt is held in its retracted position by the engagement with its projection 19 of the locking-bar, it will be seen that the guard is extended across the keyhole and in the path of the key, whereby the removal of the key from the lock, except when the bolt is in its shot or locking position, is prevented.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is-- l. The combination with a switch-stand having a stationary table, a target-rod, a rotary head fixed to the target-rod and operating contiguous to the plane of the stationary 1 table, and an operating lever or handle pivotally connected to the rotaryhead and adapting the withdrawal of a key from the lock when the bolt is retracted, and a trip operatively connected with the operating lever to actuate said locking bar and disengaging it from the locking bolt when the lever is arranged in the notch, substantially as specified.

2. The combination with a switch-stand having a stationary table, a rotary head arranged to operate contiguous to the plane thereof, and an operating lever or handle pivotally connected to the rotary head and adapted to engage a notch in the periphery of the stationary table, of locking mechanism ineluding a spring-actuated locking bolt for engaging the operating lever when arranged in said notch, a key-hole guard carried by said bolt to extend across the key-hole in the path of a key to prevent the Withdrawal thereof when the locking bolt is in its retracted position, and a trip connected to the operating lever and adapted to engage a nose or arm of the locking bar to disengage the latter from the locking bolt when the operating lever is seated in the notch, substantially as specified.

3. The combination with a switch-stand having a stationary table, a rotary head, and an operating lever pivoted to the rotary head and adapted to engage a notch in the periphery of the table, of locking mechanism for securing the operating lever in the notch, the same including a spring-actuated locking bolt, a key-hole guard carried by the bolt to extend across the key-hole and prevent the removal of a key when the bolt is retracted, a pivotal locking bar adaptedto engage a projection on the locking bolt to hold it in its retracted position, said locking bar having a nose or arm which projects above the plane of the upper surface of the table, a slidable trip mounted in the rotary head and having a beveled face to engage said nose or arm of the locking bar to disengage the same from the locking bolt, and a link connecting the trip to the operating lever and adapted to communicate motion from the latter to the former to cause the operation of the locking bar and the release of the bolt when the op erating lever is engaged with the notch, substantially as specified.

4:. The combination with a switch-stand having a stationary table, of a rotary head fixed to a target-rod and mounted upon the upper surface of the table, an operating lever pivoted to the rotary head and adapted to engage a notch in the table, said lever being extended beyond its pivot to form an arm operating in a casing carried by the rotary head,

a web or ear carried by the rotary head in In testimony that I claim the foregoing as the path of the said arm of the lever and promy own I have hereto aflixed my signature in vided with an opening to receive a staple carthe presence of two witnesses.

ried by the arm, and locking mechanism ar- BURTON S. ROBERTSON. I ranged upon the table to engage the lever Witnesses: when in engagement with the notch, substan- DAVID M. EVANS,

tially as specified. WILBUR P. GRIFFITH.

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